Objective To explore the effect of facial artery musculo-mucosal (FAMM) flap to reconstruct tongue and floor of mouth defects. Methods Between January 2011 and January 2016, 24 cases of tongue and floor of mouth defects were repaired with FAMM flap after tumor resection. There were 16 males and 8 females, aged from 38 to 70 years with an average of 55 years. The disease duration was from 1 week to 6 months with an average of 4 months. The defect located at the floor of mouth in 4 cases, at the tongue in 15 cases, and both tongue and floor of mouth in 5 cases. There were 2 cases of carcinoma at the floor of mouth, 2 cases of adenoid cystic carcinoma at the floor of mouth, 14 cases of carcinoma at the tongue, 1 case of adenoid cystic carcinoma at the tongue, and 5 cases of carcinoma at the tongue and floor of mouth. The size of defect ranged from 4 cm×3 cm to 8 cm×7 cm. Three ipsilateral and 21 contralateral FAMM flaps were harvested (5 cases were repaired with FAMM flap and submental muscle island flap due to the large defect area). The size of FAMM flap ranged from 5 cm×4 cm to 5 cm×5 cm, the size of submental muscle island flap ranged from 4 cm×3 cm to 5 cm×4 cm. Results All flaps survived after operation, without local necrosis. Wound dehiscence at donor site occurred in 5 cases, and healed after cleaning; primary healing was obtained in the other 19 cases. All the patients were followed up 8 months to 5 years with an average of 2 years and 4 months. No obvious facial deformity or fistula of the floor of mouth occurred after operation. Injury of the submandibular branch of the facial nerve was observed in 16 patients, who returned to normal at 3 months. All 24 patients had limitation of mouth opening after operation, which disappeared after 12 months. The functions of speech, chewing, and swallowing were normal. Conclusion FAMM flap has many advantages of simple operation, good repair, high flap survival rate, and less injury at donor site for repairing tongue and floor of mouth defects.
Objective To report a new offset parameter for total hip arthroplasty (THA)—greater trochanter offset (GTO), and analyze the effectiveness and feasibility of this parameter based on clinical data. Methods The 47 patients who met the selection criteria and admitted between January 2016 and May 2020 were selected as the research object. The global offset (GO) was used as the offset parameter in preoperative design. Firstly, the test-retest reliability and inter-rater reliability of GTO were analyzed based on pelvic X-ray films. The GTO reconstruction was defined as the difference between the operative side and the healthy side within ±5 mm, and 47 patients were divided into the reconstruction group and the non-reconstruction group. General data (age, gender, type and side of fracture, the interval between injury and operation), visual analogue scale (VAS) score, Harris score, gait score, and leg length discrepancy (LLD) were recorded and compared between two groups. Then, the GTO was used as the offset parameter in preoperative design of 21 patients (GTO group) admitted between June 2020 and December 2020. The pre- and post-operative clinical data were compared between GTO group and GO group to explore the feasibility of GTO for THA.Results Statistical analysis showed that GTO had good test-retest reliability (P<0.001) and inter-rater reliability (P<0.001). There was no significant difference in gender, age, type and side of fracture, the interval between injury and operation, preoperative VAS score, and LLD at 1 year after operation between the GTO reconstruction group and the non-reconstruction group, as well as between the GO and GTO groups (P>0.05). The Harris score and gait score at 1 year after operation, and difference of VAS score between pre- and post- operation in the reconstruction group and GTO group were significantly better than those in the non-reconstruction group and GO group, respectively (P<0.05). There were 23 cases (48.9%) in the GO group and 19 cases (90.5%) in the GTO group with GTO reconstruction, and the difference was significant (χ2=10.606, P=0.001). There were 25 cases (53.2%) in the GO group and 13 cases (61.9%) in the GTO group with GO reconstruction, and the difference was not significant (χ2=0.447, P=0.504). There were 34 cases (72.3%) in the GO group and 19 cases (90.5%) in the GTO group with LLD reconstruction, and the difference was not significant (χ2=2.777, P=0.096). Conclusion GTO has reliable test-retest reliability and inter-rater reliability. GTO as a parameter of preoperative offset reconstruction plan of THA can obtain good reconstruction of offset and limb length, and obtain a good effectiveness.